Space heater stove



Oct. 22, 1963 H. G. GENGE SPACE HEATER sTovE Filed April 4, 1960 taiesThis invention is concerned with a novel form of device for use bycampers or others not only as a cooking stove, but also in the internalheating of tents, and capable of being used in other similar enclosuressuch as huts used by campers or small out-buildings.

At the outset it may be mentioned that both space heaters and stoves areof course well known, but no construction has so far been proposedembodying the characteristics of both devices into a single unitdesigned especially for use in tents or the like. For instance, theconvent-ional types of space heaters and stoves are more or less of apermanent installation for household requirements. Also the usual stovesand heaters are much too high or large to be suitable for installationin a limited enclosure such as a small hut or tent.

rIihe object of the present invention is to provide a tent or the likespace heating stove which is of a compact nature to be capable of easyinstallation, and be portable.

Generally the invention covers a tent or the like space heating stovehaving an inner lire or burner chamber with a door-covered access and awaste gases bottom exhaust, an outer surrounding chamber with a cool airbottom inlet and heated air upper outlets, these chambers being of a lowcompact nature with a flat metal cooking top or hot plate, a cool airfunnel adapted to be removably attached to the said inlet and to layadjacent the ground to the outside of -a tent and a flue adapted to beremovably connected to the said exhaust and to lay along the ground tothe outside of the tent, whereby cool air may pass along the funnel, beheated in the outer chamber land the heated air pass through the upperoutlets, and whereby the Waste gases pass from -the inner chamberthrough the exhaust and the iiue to the outside of the tent.

The invention will be more fully lreferred to hereinafter .with the aidof the accompanying drawing, in which:

FIGURE l is a view showing the stove installed in a tent or hut,

FIGURE 2 is a sectional elevation, but with I'che cold air inlet notcorrectly positioned,

FIGURE 3 is a back elevation,

FlGURE 4 is -a sectional plan View, and

FIGURE 5 is a front elevation with the redoor removed.

In further describing the invention, the stove is of a low compact sizeas for instance one of about fourteen inches in diameter and about teninches high, but the stove is not limited to these measurements.Slightly smaller or larger types may be produced to suit say small huts.

The inner and outer chambers can be provided by two casings or cylinders1li, 11, a smaller one arranged within the other, the top plate 12welded thereto closing the cylinders at this end and providing thecooking surface or hot plate of the stove. Within the outer cylinder 11,which is the peripheral wall of the stove, is provided the access by alarge opening 13 over which is hinged the cover or door 14 land stripscan be welded or edges of the opening can be inturned across that partof the space between the cylinders to blank oi the outer chamber 11 fromthe edges of the access opening 13 to the inner chamber 10. Within thischamber are set usual grate bars 15 positioned from below the accessacross 3`y79652 Patented Oct. 22, 1963 ice to the exhaust, which is ashort duct 16 disposed vertically on the inner wall opposite the accessopening from a segmental base plate 10 of the inner chamber.

In the outer wall of the stove, just about opposite the access `opening13 to the inner chamber is provided the air inlet in the form of asocket 17 of about three inches in diameter. The upper air outlets are anumber of small holes 1S provided in 4the outer wall just below the topplate 12 and suitably positioned.

The air inlet funnel is an open metal cylinder 19 of a diameter to-tonto the socket 17 and of a length to extend outside the tent or hut.The waste gases or smoke flue consists of a light iron channel 20 withits flanges or edges underneath, having a hole 21 at one end adapted tomate with the bottom of the exhaust duct 16; the flue is of a length toextend outside the tent or hut Iand in its outer end is provided asocket 22 into which is pushed a tapered. chimney 23 which extendsvertically to a desired height. The size of lthis iiue and chimney issuch as to suit the capacity of the inner chamber of the lire box.

Whilst a stove of circular cross-section has just been described, it maybe made of a square or oblong crosssect-ion.

The stove is installed or set in the ground inside the tent and the |airinlet funnel 19 is quickly and easily put in place by disposing it onthe ground under the tent wall 24 and at the same time pushing its innerend into the socket 17 provided on the peripheral wall of the stove. ltis impossible for dust from an ash-pit 25 provided under the gra-te toenter the tair circulating system.

The smoke iiue channel 20 is laid flush with the ground from the tirebox with its hole 21 aligned with the exhaust duct 16 to the outside ofthe tent, clear of its wall, by setting channel 2t? in Ia small ditch sothat smoke is trunked at ground level. A damper or draft control plate26 consisting of a fiat piece of tin or steel is positioned across thefront of the ditch so that on movement it regulates degree of draftrequired. The draft control plate 26 is completely separate from thestove proper so that it may be slid back or forth over the front edge ofthe ash pit 25. The tapered chimney 23 is slipped into the socket 22 atthe outside end of the tlue channel and the stove installation iscomplete. The ditch is blocked between the grate and the liucautomatically by the iiue channelling.

With the stove set at ground level, re started in the lire box 1G, coldair is drawn in through the inlet funnel 19 from outside, the airpassing over the walls 10, 11 becomes heated, rises and passes outof theAupper outlets 18 to circulate about and heat the space inside the tent.The stove being low set will provide plenty of room above it for aclothes-drying rack. The top hot plate 12 can be used for cooking ormaking toast. The cold air funnel 19, smoke flue 20 and chimney Z3 arenot screwed or bolted, but may consist of sections so that they can bequickly and easily dismantled without the use of tools, and these partsfand the stove carried for later use at another camping site.

In areas where lit would be permitted, the digging of the ashpit underthe stove would solve the problem of lash disposal, ln the case ofcamping ground installation which would be on open ground andsemi-permanent, the stove would be set on concrete level with the groundsurface. A recess under the stove in `the concrete would act as an-ashpit from which ashes could be removed with an ordinary householdshovel. lf it was desired to have a readily controlled tire burn allnight, a known type of diesel oil burner could be fitted in the lirebox.

Finally, the advantages of this stove yare its compactness withportability, minimum of 4working parts, ease of installation, itscooking and space-heating facilities together with the incorporation ofa flush iiue with ground level flue which has a flat upper surface toprovide extra cooking Aand heating surface. No alteration is required toa tent for use of the stove. The stove lis so designed that it brings infresh air from outside the tent Wherever the lire is burning. The designof the stove has obviated the usual feature of down-draft lues, i.e.,that a large volume of smoke is created inside the tent after kindlingthe tire and before the flue and chimney create a good draft.

Having now described my invention, what I claim is:

A comp-act camp stove particularly adapted for space heating and cookingWithin a tent comprising an inner cylindrical casing of sheet metalforming a lire chamber, an access aperture Within said casing, a hingeddoor covering said aperture, a segmental base plate mounted across aportion of the bottom end of said inner casing opposite said aperture, agrate comprising a plurality of parallel bars mounted Within theremaining, open portion of said bottom end and extending thereacross,said grate adapted to be disposed over a ground hole serving as an 'ashpit, an adjustable draft plate extending from the bottom of the casingand adapted to cover an edge portion of the ground hole beneath saidgrate to regulate the draft through said grate into the lire chamber, anexhaust opening in said segmental plate adjacent the inner casing andopposite said aperture, an exhaust duct surrounding said opening andextending upwardly therefrom along the inside of said inner casing to aposition spaced below the top edge of the inner casing, said ductconstituting a discharge for the products of combustion, a cylindricalouter wall of sheet metal spaced from and substantially surrounding saidinner casing except in the region ofthe door-covered aperture therein,said outer Wall therebyk defining -a convection chamber, a flat,circular metal plate closing the top ends of both said inner casing andsaid convection chamber, said plate forming a rst cooking and heatradiating surface, a cold air inlet socket extending radially throughthe outer w-all yat the bottom thereof and offset circumferentially fromsaid exhaust duct, a horizontal funnel coupled to said socket, saidtunnel being adapted to extend outside the tent at ground level toconvey fresh air to said convection chamber, a plurality of spaced holesin the upper edge of said outer Wall for emitting heated air from saidconvection chamber into :the tent, la channel-shaped flue means belowsaid casing for conveying the waste products of combustion out of thetent, said flue means being adapted to be mounted in a shallow ditchextending to the outside of the tent with the upper surface of said iiuemeans flush with ground level, the upper surface of said iiue moansbeing adapted to form a second, distinct cooking and heatV radiatingsurface inside the tent, means connecting one end of said line rneans tosaid exhaust duct, and achimney connected to .the other end of said fluemeans.

References Cited in the file of this patent UNlTED STATES PATENTS753,104 Pelmulder Feb. 23, 1904 1,000,063 Akin Aug. 8, 1911 1,122,536Price Dec. 29, 1914 1,348,427 Landers Aug. 3, 1920 2,214,292 Dalzell etal Sept. 10, 1940 2,715,897 Newland et al Aug. 23, 1955

